Serious Sam HD Four-Pack Hits Steam

Sam fans can now buy instant co-op joy for themselves and three friends with a $60 Serious Sam HD four-pack on Steam--a $20 discount essentially giving a free copy.

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Packing sixteen-player co-op, the prettied-up revamp of Croteam's hectic shooter was released for PC in November 2009 and landed on Xbox Live Arcade earlier this month.

An 'HD' version of the second instalment Serious Sam: The Second Encounter is also in the works, packing a new co-op tournament mode and apparently due in "early 2010."